To really harness the power of Ghostscript in Windows, it is useful to install
GSView

GSview

Open the installer file:

After pressing setup, go through the next few screens:

You may choose to associate gsview with postscript files (.eps and .ps) and even
.pdf files. However, by associating GSview with .pdf files, Acrobat and Acrobat
reader will no longer open pdf files by default.

After selecting the associations made, select the default directory where GSview
will be installed:

Describe where the installation's program files will be located. Additionally
choose if this is installed for all users or just the current user.

Then install:

Mac OSX install

This will allow viewing of postscript files and even conversion to pdf files.